Feature Request: send files with their paths to s3

[kgraf80]

Can you change code in /gulp-s3-upload/index.js

from:
keyname = keyTransform(file.relative);
to:
keyname = keyTransform(file.relative, file.path);

in this code:

if(keyTransform) {

    //  Allow the transform function to take the
    //  complete path in case the user wants to change
    //  the path of the file, too.

    // >>>>>>> change here
    keyname = keyTransform(file.relative);

} else {
    // ...Otherwise keep it exactly parallel.

    keyparts = helper.parsePath(file.relative);
    keyname  = helper.buildName(keyparts.dirname, keyparts.basename + keyparts.extname);
}

It help send files with their paths when we use keyTransform (see my answer in #33)
Thank you